Results 41 to 50 of about 1,571 (154)

APLICAÇÃO DE AMIDOXIMAS COMO CATALISADORES DA REAÇÃO DE ALILAÇÃO POR ALILTRIFLUOROBORATO DE POTÁSSIO EM MEIO BIFÁSICO

Química Nova
We describe the application of an amidoxime as catalyst in the synthesis of homoallylic alcohols from the allylation reaction of aldehydes with different features using potassium allyltrifluoroborate. The reaction was conducted with a catalytic amount of
Dmistocles de Andrade, João Rufino de Freitas Filho, Juliano Carlo Rufino Freitas   +2 more
doaj   +1 more source

1,1‐and 1,2‐Diborylalkenes: Preparation and Synthetic Applications

Advanced Synthesis &Catalysis, Volume 368, Issue 12, 17 June 2026.
In this review, we highlight recent advances in the synthesis and reactivity of 1,1‐diborylalkenes and 1,2‐diborylalkenes, along with various transformations leading to C‐C, C‐heteroatom, and multicomponent products. By providing a comprehensive and practical resource, this review aims to assist researchers in exploring the synthetic utility of 1,1 and
Jayaram Vankudoth, Maruti Mali, Fabienne Berrée   +2 more
wiley   +1 more source

1,1‐Disubstituted Vinylbromides: Versatile Building Blocks for the Synthesis of Nitrogen‐Containing Heterocycles

European Journal of Organic Chemistry, Volume 29, Issue 23, 16 June 2026.
1,1‐Disubstituted vinylbromides are key intermediates for constructing nitrogen‐containing heterocycles. This review provides an overview of the synthetic applications of 1,1‐disubstituted vinylbromides and summarizes recent developments in reaction methodologies, mechanistic insights, and the structural diversity of N‐heterocyclic compounds accessible
Anne Westermeyer, Jun Fang, Chonghuo Liu, Guillaume Lefèvre, Gérard Guillamot, Phannarath Phansavath, Virginie Ratovelomanana‐Vidal   +6 more
wiley   +1 more source

Synthesis of a C‐2 Functionalized l‐Iduronic Acid Derivative as a Candidate Pharmacological Chaperone for MPS II (Hunter Syndrome)

Chemistry – An Asian Journal, Volume 21, Issue 11, 15 June 2026.
A C‐2 functionalized l‐iduronic acid derivative was designed and synthesized as a candidate pharmacological chaperone for iduronate‐2‐sulfatase (IDS), the enzyme involved in the lysosomal storage disease MPS II (Hunter syndrome). The synthesis overcomes significant synthetic challenges associated with manipulations of L‐ido scaffolds.
Vaibhavi Nagendra, Shifaza Mohamed, Nicholas W. See, Norbert Wimmer, Daniel Neumann, Paul J. Trim, Marten Snel, Aidan J. Brock, Jack K. Clegg, Neha S. Gandhi, Kim M. Hemsley, Adeline A. Lau, Vito Ferro   +12 more
wiley   +1 more source

Catalytic Enantioselective Epoxidation of Homoallylic Alcohols by Chiral Zirconium Complexes. [PDF]

ChemInform, 2002
AbstractFor Abstract see ChemInform Abstract in Full Text.
Takahiro, Okachi, Norio, Murai, Makoto, Onaka   +2 more
openaire   +2 more sources

Advancements in Carbohydrate Scaffold Synthesis: Exploring Prins Cyclization Methodology

Reactions
The synthesis of natural and unconventional compounds with carbohydrate structures is of great interest to glycochemists due to their vital biological roles. In recent years, there has been significant progress in developing direct and indirect synthetic
Sateesh Dubbu, Santhi Jampani
doaj   +1 more source

Aqueous Barbier Allylation of Aldehydes Mediated by Tin

Molecules, 2007
The aqueous tin-mediated Barbier reaction affords good to excellent yields and moderate syn diastereoselectivity under basic and acidic conditions. The high yields and stereoselectivity observed in the case of o-substituted aldehydes suggest a cyclic ...
Ivani Malvestiti, Lothar W. Bieber, Marcelo Navarro, Fernando Hallwass, Lívia N. Cavalcanti, Maria Ester S. B. Barros, Dimas J. P. Lima, Ricardo L. Guimarães   +7 more
doaj   +1 more source

Transition Metal‐Catalyzed Functionalization of Nonallylic Alkenyl Alcohols via Chain‐Walking Strategies

Advanced Synthesis &Catalysis, Volume 368, Issue 9, 5 May 2026.
This minireview outlines recent advances in chain‐walking reactions of nonallylic alkenyl alcohols catalyzed by various transition metals, including palladium, ruthenium, rhodium, iridium, and nickel. Furthermore, the corresponding reaction mechanisms are discussed.
Yong Huang, Chong Liu, Jasmine X. Yan, Md Sajib Joardar, Ke Yang, Haibo Ge   +5 more
wiley   +1 more source

Cyclization of Homoallylic Alcohols with Iodine/Iodine(III) [PDF]

Proceedings of the 15th Brazilian Meeting on Organic Synthesis Proceedings, 2013
The use of hypervalent iodine with a catalytic amount of molecular iodine facilitates the formation of tetrahydrofurans rings from homoallylic alcohols. The proposed mechanism (Scheme 1) 3 consists mainly in the oxidative displacement of iodine from alkyl iodides and the ring expansion of cyclic ethers having an iodoalkyl substituent. In previous work,
Paulo Scarassati, Luiz F. Silva Jr.
openaire   +1 more source

Metal free synthesis of homoallylic alcohols promoted by ultrasound

Ultrasonics Sonochemistry, 2014
The use of ultrasound irradiation to promote the allylation of aldehydes containing different functionalities with potassium allyltrifluoroborates is described. The method features the use of a minimum amount of acetone as solvent, without any other catalyst or promoter.
Jucleiton José R, Freitas, Túlio R, Couto, Italo H, Cavalcanti, Juliano C R, Freitas, Roberta A, Oliveira, Paulo H, Menezes   +5 more
openaire   +2 more sources